Prime Mates is the first episode of Season 6 and part 1 of episode 66.

Plot

Back when Mojo Jojo tried to take over the world with primates, there was one monkey who didn't get his due; Mopey Popo. Now, Mopey is back to try and be evil just as Mojo Jojo intended, if only he could get something right.

Trivia

Monkey from Dexter's Laboratory makes an cameo appearance as a doll/plush in Mojo Jojo's bed at the beginning of the episode.